Barnes, J.G.P. (John Gilbert Presslie)
Programming in Ada
Addison-Wesley, 1981
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Iverson, Kenneth E.
A programming language
John Wiley & Sons, 1962
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Barnard, David T.
PL/1 programming problems and applications
Reston Publishing Company, Inc., 1982
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Rajaraman, V.
Computer programming in pascal
Prentice-Hall, 1984
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Welland, Ray
Methodical programming in Cobol-85
Pitman, 1993
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